Procedural world generation - ground and traps seems to not generating.

[User137]

When you are using multiconditional if statment all conditions get checked even if first condition isn't met already.

This is not true. I can demonstrate that with simple example:

var sl: TStringList;
begin
  sl:=nil;
  // Version 1: No errors
  if (sl<>nil) and (sl.Add('Test')>0) then exit;
  
  // Version 2: Runtime error
  //if (sl.Add('Test')>0) then exit;

If-statement ends in the (sl<>nil) condition, because any further conditionals wouldn't change the logical end result. If there was OR, instead of AND, then it would have to proceed to next comparison because (sl<>nil)=false.

edit: Have you double/triple-checked the drawing code, or done analyzing to the chunks to see if traps are actually generated, just hidden.